Subtract 10/21 from 54/12
1st number: 4 6/12, 2nd number: 10/21
54/12 - 10/21 is 169/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 12 × 7 = 84,
54/12 = 54 × 7/12 × 7 = 378/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
10/21 = 10 × 4/21 × 4 = 40/84 - Subtract the two like fractions:
378/84 - 40/84 = 378 - 40/84 = 338/84 - After reducing the fraction, the answer is 169/42
- In mixed form: 41/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/12-20/21 54/24-10/21 54/12-10/42 54/12-30/21 54/36-10/21 54/12-10/63 54/12-50/21 54/60-10/21 54/12-70/21 54/84-10/21